2006 ACURA CSX Service Repair Manual

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Page 1905 of 2893

ACURA CSX 2006 Service Repair Manual (#
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21-26Climate Control
Circuit Diagram
PNK
RED/BLK
12
1 2
Q6
1 2
GRN/REDRED
IG2 HOT in ON (II)
CAN HI
CAN LO
FAN HI ACC L
FAN LO A14
A4
A5 13
A/C C

Page 1906 of 2893

ACURA CSX 2006 Service Repair Manual
21-27
RED
(With navigation system)
30 29 28
F3 F2 F4
NAVIGATION UNIT
CLKSO
BLU
RED
YEL 12 V
PURBLU
LT GRN
BRN
BRN
BLU
REAR WINDOW DEFOGGER RELAY DASH LIGHTS
BRIGHTNESS
CONTROLLER
GRY
1
RED 18
2
3

Page 1907 of 2893

ACURA CSX 2006 Service Repair Manual (#

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DTC B1202 or DTC indicator C and AUTO: DTC B1205, DTC indicator J and AUTO

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DTC B1202 or DTC indicator C and AUTO: DTC B1205, DTC indicator J and AUTO or L and AUTO:
DTC B1206 or DTC indicator F and AUTO:
DTC B1207 or DTC indicator D and AUTO:
YES
NO
YES
NO
YES
NO
21-2821-28Climate Control
DTC Troubleshooting
Climate Control Unit Internal Error
Climate Control Unit Lost
Communication with Gauge Control Module
(TACH) (VSP/NE message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ECT
message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ILLUMI
message)
NOTE: Check the battery condition (see page 22-67) and
the charging system (see page 4-26).
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
The climate control unit is faulty, replace the
climate control unit.
Intermittent failure, the climate control unit is
OK at this time. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check the DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the gauge control module
(TACH) and climate control unit circuit.
5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT INFORMATION menu.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Go to step 7.
7. Turn the ignition switch to LOCK (0).
I s DT C B1202 or C and AU T O i nd i cat ed ?
I s DT C B1205 , J and AU T O or L and AU T O, and /or DT C B1206 or F and AU T O, and / or DT C B1207or D and AU T O i nd i cat ed ?
I s gauge cont r ol mod ul e d et ect ed ?
08/08/21 14:41:04 61SNR030_210_0029
ProCarManuals.com
DYNOMITE -2009-

Page 1908 of 2893

ACURA CSX 2006 Service Repair Manual
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YES
NO YES
NO
YES
NO
DTC B1220 or DTC indicator E and AUTO:
21-2921-29
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
UNDER-D

Page 1909 of 2893

ACURA CSX 2006 Service Repair Manual

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YES
NO
YES
NO YES
NO
21-30Climate Control
DTC Troubleshooting (cont’d)
BLK
YEL
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLK
YEL
RED
CLIMATE CONTROL UNIT 32P CONNECTOR

Page 1910 of 2893

ACURA CSX 2006 Service Repair Manual
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DTC B1225 or DTC indicator A:
YES
NO
YES
NO YES
NO
YES
NO
21-31
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
L

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DTC B1225 or DTC indicator A:
YES
NO
YES
NO YES
NO
YES
NO
21-31
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
LT BLU LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR RED
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
An Open in
the In-car Temperature Sensor Circuit
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the in-car temperature sensor
circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the in-car temperature sensor (see page 21-67), and test it (see page 21-67).
Go to step 7.
Replace the in-car temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the climate control
unit 32P connector terminal No. 26 and the in-car
temperature sensor 2P connector terminal No. 1.
Go to step 9.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
9. Check for continuity between the climate control unit 32P connector terminal No. 19 and the in-car
temperature sensor 2P connector terminal No. 2.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
outside air temperature sensor 2P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
I s DT C B1225 or A i nd i cat ed ?
Is t he i n-car t emper at ur e sensor OK ? Is there continuity?
Is there continuity?
08/08/21 14:42:15 61SNR030_210_0032
ProCarManuals.com
DYNOMITE -2009-

Page 1911 of 2893

ACURA CSX 2006 Service Repair Manual

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DTC B1226 or DTC indicator B:
YES
NO
YES
NO YES
NO
YES
NO
21-32Climate Control
DTC Troubleshooting (cont’

Page 1912 of 2893

ACURA CSX 2006 Service Repair Manual
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DTC B1227 or DTC indicator C:
YES
NO
YES
NO YES
NO
21-33
YEL
OUTSIDE AIR TEMPERATURE SENSOR 2P CONNECTOR CLIMATE CONTROL

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